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Reconfigurable microwave signal processor with a phase shift of π
Optics Express
|May 3, 2018
Summary
We developed a reconfigurable microwave signal processor using optical intensity spectrum shaping. This technique enables precise phase shift implementation for advanced signal processing functions up to tens of gigahertz.
Area of Science:
- Photonics
- Microwave Engineering
- Optical Signal Processing
Background:
- Microwave signal processing traditionally requires complex electronic circuits.
- Reconfigurable processing offers flexibility but often faces bandwidth limitations.
Purpose of the Study:
- To demonstrate a novel reconfigurable microwave signal processor.
- To achieve high-bandwidth signal processing using optical techniques.
Main Methods:
- Shaping the input optical intensity spectrum to perform microwave signal processing functions.
- Implementing a phase shift of π using differential detection.
- Utilizing an incoherent optical source and a user-defined optical filter for broad bandwidth and high resolution.
Main Results:
- Accurate temporal intensity Hilbert transformations and differentiations of Gaussian-like pulses.
- Achieved processing bandwidths up to tens of gigahertz.
- Demonstrated excellent agreement between the frequency response and ideal signal processing functions.
Conclusions:
- The proposed optical approach offers a reconfigurable and high-bandwidth solution for microwave signal processing.
- This technique accurately performs complex functions like Hilbert transformations and differentiations.
- The method shows promise for future advancements in flexible microwave systems.
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